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http:__environment.nationalgeographic.com_environment_energy_great-energy-challenge_personal-energy-meter_
https:__docs.google.com_file_d_1meY4Af-y2g29RdiMvpTs4dRXDY1eVzTei59v6VZ9kdz0vFAnGIOAniZBeBfR_edit
http://www.nature.org/greenliving/carboncalculator/index.htm Website that estimates your Carbon Footprint. The resource calculates individuals and families annual greenhouse gas emissions as well ...
http:__www.nature.org_greenliving_carboncalculator_index.htm